Nonqualified Deferred Compensation Plan Design: Best Practices for Employers
Nonqualified deferred compensation plan design best practices: eligibility, deferral limits, payout options, employer credits, funding and communication.
Good nonqualified deferred compensation plan design starts with a narrowly defined eligible group, deferral and payout options that solve real problems for your executives, and a funding and communication approach your company can sustain. Every option you add gives participants more flexibility and more complexity, so the best designs add features only when your eligible employees will be able to compare them.
This guide is for private employers that sponsor, or are starting, a top-hat NQDC plan under Section 409A. It covers each design lever, what peer plans report and how each choice affects your executives' decisions. For the participant's view, see what an NQDC plan is.
Your plan document governs how any of these features work, so involve ERISA and tax counsel, your recordkeeper and your advisers before you adopt or change a design.
The design levers at a glance
Most NQDC plan decisions fall into eight areas.
| Design lever | Common choices | What to weigh | Effect on participants |
|---|---|---|---|
| Eligibility | Title or band, a pay threshold, or both | Staying within the "select group" for the top-hat exemption | Clear rules reduce "am I eligible?" questions |
| Deferral limits | Maximum percent of base and of bonus, sometimes minimums | Room for executives capped out of the 401(k) | Higher caps help only if people can size their election |
| Election windows | Annual window before December 31, plus newly eligible and bonus elections | 409A timing rules and your bonus calendar | Short windows rush an irrevocable decision |
| Distribution options | Separation, scheduled in-service accounts, lump sum, installments up to 10 or more years | Administrative load and state-tax effects | More choices, harder comparisons |
| Employer credits and vesting | Restoration match, discretionary credits, cliff or graded vesting | Cost, retention value, FICA timing | Credits raise the value of deferring if people see them |
| Investment menu | Mirror the 401(k), a similar or a shorter lineup | Hedging the liability and fee levels | Fewer, clearer options are easier to use |
| Informal funding | Rabbi trust, corporate-owned life insurance (COLI), mutual funds, or none | Cash flow, accounting and benefit security | Visible security can ease credit-risk worries |
| Communication and decision support | Enrollment kits, meetings, planners, modeling tools | Keeping education on the education side | Understanding is the barrier sponsors cite most |
Eligibility: defining the select group
A top-hat plan is exempt from ERISA's participation, vesting, funding and fiduciary rules only if it is unfunded and maintained "primarily for the purpose of providing deferred compensation for a select group of management or highly compensated employees" (29 U.S.C. §1101). A DOL ERISA Advisory Council report notes that Congress expected that exemption to apply narrowly.
With no bright-line test, most sponsors combine an organizational test (such as vice presidents and above) with a pay threshold. The highly compensated employee threshold under IRC 414(q) is $160,000 for 2026 (IRS Notice 2025-67). Treat it as a floor for discussion with counsel rather than a safe harbor, because an eligible group that reaches too far down the organization can put the exemption at risk.
Two practical points:
- File the top-hat statement. A top-hat plan can satisfy ERISA reporting through a short statement filed electronically with the DOL within 120 days after the plan becomes subject to Part 1 (29 CFR 2520.104-23). Paper filings no longer count.
- Write down how people enter and leave. Mid-year promotions and acquisitions create edge cases that a written rule settles.
Deferral limits and election windows
Most plans set separate maximum percentages for base salary and bonus. PSCA's 2025 NQDC survey found participants deferred an average of 10% of base salary and 23% of bonus pay. High caps give executives room but make the "how much?" question harder, so pair them with a way to see what a percentage means in dollars and taxes.
Build the window around 409A timing
Under Treas. Reg. §1.409A-2, an election to defer pay for a service year generally must be made by the close of the preceding taxable year, so the 2027 salary election must be in by December 31, 2026. Newly eligible participants can elect within 30 days, and bonuses that qualify as performance-based compensation over a period of at least 12 months can be elected as late as 6 months before the period ends.
A window that opens in November and closes in mid-December leaves little time for an irrevocable decision, and many executives also want to coordinate with next year's 401(k) limits. The 2026 elective deferral limit is $24,500 and the 401(a)(17) compensation limit is $360,000; the IRS is expected to publish 2027 figures in November. See the NQDC open enrollment timeline for a planning calendar and the participant-side 409A deferral election rules.
Consider a 401(k) refund offset
If your 401(k) fails the ADP test, executives can get refunds of their contributions. The 2024 Newport/PLANSPONSOR survey found that 15% of businesses had seen 401(k) contributions returned to executives in the past three years. Treasury rules let some linked-plan adjustments to NQDC deferrals avoid counting as new elections, but only up to the 402(g) limit, so have counsel draft any such feature. The guide on NQDC for highly compensated employees explains the mechanics.
Distribution options: flexibility versus complexity
Distribution choices shape participant outcomes most directly, and complexity grows fastest here. PSCA's 2025 survey found that 72.9% of employers allow distributions at separation from service and 64.3% permit distributions on a date the participant chooses. In the 2024 Newport/PLANSPONSOR survey, 95% of plans allowed installments, 96% allowed lump sums and 23% offered a partial lump sum with installments.
Scheduled in-service accounts
In-service accounts let executives save for a known expense, such as tuition, on a fixed date, which appeals to people not yet focused on retirement. Each account is another payout election to track, so many plans cap the number per participant.
Installment length and state tax
Offer installments of 10 years or more if you can. Under 4 U.S.C. §114, a state cannot tax a nonresident on NQDC paid in substantially equal periodic payments, at least annually, over at least 10 years or for life. An executive who retires from a high-tax state to a low-tax one may avoid the former state's tax only with a qualifying schedule. Lump sums and shorter schedules are not protected. The state tax and moving guide covers the details, and lump sum vs. installments shows the bracket effects.
The trade-off is longer exposure to the company's credit.
Private versus public companies
Public companies must delay separation payments to "specified employees" for six months under 26 U.S.C. §409A; private companies generally are not subject to that rule. But private-company executives may already hold illiquid company equity, with no public stock price or credit rating to reassure them, so benefit security and clear communication about it matter more.
Employer credits, investment menu and funding
Employer credits and vesting
Employer money is a strong lever for making the plan worth using. Common designs include a restoration match that replaces 401(k) match lost to IRS limits, a discretionary credit and a fixed retention credit. In the 2024 Newport/PLANSPONSOR survey, company contributions most often vested 100% after three years or after five years (36% each). For match types, cost and FICA timing at vesting, see the employer match guide.
Investment menu
NQDC investments are usually notional: balances track the funds participants choose, but the money remains the company's. PSCA's 2025 survey found almost 40% of plans offer the same options as the qualified plan and about one-third offer a similar lineup. Mirroring the 401(k) simplifies communication; a shorter menu is easier to hedge and to use. Either way, watch fees, which erode the advantage of deferring.
Informal funding: rabbi trust, COLI or nothing
PSCA's 2025 survey found that two-thirds of respondents set assets aside for future NQDC obligations, and 90.6% of those use a rabbi trust. In the 2026 Newport/PLANSPONSOR survey, almost 50% of sponsors used COLI as their primary financing vehicle, up from about 40% in 2024. (Newport, part of Ascensus, is an NQDC provider.)
Set-aside assets help match the liability and signal commitment, but they do not protect participants in insolvency: rabbi trust assets remain available to the company's general creditors. Say so plainly, and see NQDC risks and rabbi trusts for the participant's view.
Communication and decision support
Design features help only if participants understand them. In the 2026 Newport/PLANSPONSOR survey, the most cited participation barriers were lack of understanding (46%) and irrevocable election rules (27%). PLANADVISER's coverage of the same survey reported that 82% of sponsors were satisfied with their NQDC communication, yet 70% of participants said they still did not understand the plan.
The gap widens as the design gets richer: an executive choosing among a separation account, in-service accounts and several installment options is making linked, irrevocable decisions. Best practices:
- Describe each option in dollars, with an example for a typical eligible employee.
- Explain the key trade-offs: tax rate now versus at payout, payout length and state tax, and employer credit risk.
- Open enrollment early enough for people to run numbers and consult their own advisers.
- Keep communications on the education side of the line. Top-hat plans are largely exempt from ERISA's fiduciary rules, but many sponsors borrow DOL Interpretive Bulletin 96-1 as a framework for what counts as education. Review your approach with counsel. See NQDC investment education vs. advice.
The most direct fix is to give participants a way to model the options you actually offer. NQDC Calculator can be licensed for your eligible employees: your deferral limits, payout schedules, employer credits and vesting are configured with you as starting values, and each employee models federal and state tax for both paths, payout schedules, state moves and employer credit risk privately. You never see individual inputs, results or elections, and the tool never recommends an election. For other options, see benefits decision support tools for deferred compensation.
Frequently asked questions
Who should be eligible for an NQDC plan?
Eligibility should be limited to a select group of management or highly compensated employees to keep the top-hat exemption. Most sponsors combine a title or band with a pay threshold. The 2026 HCE threshold of $160,000 is a common reference point, but it is not a safe harbor, so have counsel review your definition.
How many investment options should an NQDC plan have?
There is no required number. PSCA's 2025 survey found almost 40% of plans mirror the qualified-plan lineup and about one-third offer a similar one. A shorter, low-cost menu is easier to hedge and to use.
Which distribution options matter most?
Separation-from-service payouts and installments are the core. In-service accounts add appeal for executives saving for nearer-term goals. Offering installments of 10 years or more matters for executives who may move to a lower-tax state, because only qualifying schedules are protected under 4 U.S.C. §114.
Should we informally fund the plan with a rabbi trust or COLI?
Many sponsors do: PSCA's 2025 survey found two-thirds set assets aside, mostly in rabbi trusts, and the 2026 Newport/PLANSPONSOR survey found almost half use COLI as their primary vehicle. Funding helps match the liability and signals commitment. It does not protect participants if the company becomes insolvent.
Which design features go along with higher participation?
The surveys cited here do not isolate the effect of any single feature. Employer credits raise the value of deferring, but since lack of understanding is the most cited barrier, clear communication and a way to model each option likely matter as much.
What should a private company do differently from a public one?
Private companies are generally not subject to the six-month delay for specified employees. Their executives often hold illiquid company equity and have no public credit signals, so benefit security and clear explanations of credit risk deserve extra attention.